High-tension transformer.



Patemed Sept. 21, 11115.

C. SCHRADER.

HIGH TENSION TRANSFORMER.

APPLICATION FILED 0502,1910.

1% amm UNITED STATES Pars GFFICE.

CARL SCHRADER, 01S HALENSEE, NEAR BERLIN. GERMANY, ASSIGNOR TO SIEMENS &

HALSKE, A. 5%., OF BERLIN. GERMANY, A CORPORATION OF GERMANY.

HIGH-TENSION TRANSFORMER.

Specification of Letters Patent.

Patented Sept. 21. iti'i.

Application filed December 2. 1910. Serial No. 595.277.

Be it known that I. Cfia Scnnlwnn, a subject of the German Emperor. andresiding at Halensee. near Berlin. Germany. have invented certain newand useful Improvements in Higlr-Ter1sion 'iranst'ormers. of which thefollowing is a specification.

My invention relates to transformers for current of high tension.v and aprimary object is to provide such a transformer which substantiallyconsists of only a few turns of the primary conductor. an iron core,carry ing the secondary winding. surrounding the primary conductor. anda suitable insulator interposed between the iron core and the conductor.\Vhen employing such transformers for very high voltages for exampleover 30,000 volts, various disadvantages are obseryed which particularlyresult from the undue increase in the size of the insulator constructionsurrounding; the primary conductor. both in length and in thickness, inorder to prevent the current jumping across from the ends of the primaryconductor to he row tension windingsurrounding the I central portion ofthe insulator. The detail construction of such insulators per se isknown in the art. Also due to such increase in insulator size themagnetic connection between the primary and secondary windings isinsutlicient owing to the great distance of the iron body from theformer winding. this being more apparent in such transformers because ofthe very small strength of current traversingthe primary conductor atsuch high voltages. Such devices satisfy only very small demands withregard to both the constancy of the ratio of transiorination and also toefects due to displacement of phase between the primary and secondarycurrents. and consequently are quite unsuitable for purposes requiringgreat exactitude. for exainp e for connecting to watti-ncters of variouskinds. Now according to my inventon I remedy these defects in anexceedgly simple manner by employing an insulator wliich has heretoforebeen employed for collhectors. This insulator comprises a plurality ofconcentric insulating cylindes which are each shorter than the nextinner one and are separated by layers of metal.

These tlomlucting layers cause the distribu'' tion or voltage on thefree surfac; and that Within the dielectricto suit one another. Bysuitably selecting the distance between the Figs. 3 and l, the cu.otherwisc customary in such transformers.

my transformer is not only materially SlllilllLl and cheaper than thewell-known forms of such transformers. but it possesses. above all.materially bcttcr electrical properties. as it is possible. to place theiron core carrying the secondary winding in immc diate proximity to theprimary conductor surrounded by it.

Several illustrative embmlimcnts of my invention are represented by wayof example in the accompanying drawing. wherein:

Figures 1 and 2 are elevation and top plan view. respectively. showing aform comprising a primary winding composed-0t several strands connectedin series and pass ing through two insulators. and Figs. 3 and l arelike views. respectively.

form in which the secondary winding is'ai ranged on both the insulators.

In these illustrative cmboduncnts of my invention the primary conductorcomprises i a number of wires a insulated from one another. connected inseries and arranged in two parallel insulating sleeves each compr sing aplurality of concentric insulating cylinders b, which are preferablygraduated outwardly in length and are separated from each other bylayers o'l metal c.

showing a The laminated annular iron core (I on whiclr-T.

the secondary windin c is )lacc l suii'roumls thccentral portionof....tlre sleeve. in the illustration shown in Figs. Tamil? only one.of the sleeves is providcd with iron't'aore carrying thcseco ularywinding/c.

in the illustrat-i embodiment shown in ing secondary current. To thisend. a second iron core having a secondary winding e. is provided on thesecond insulating slcevc. The two secondary windings v rrcnt passingthrough the second sleeve is also utilized for produce and c are no J8.y invent L'zompaz'ea with vis" In 2! nrmc- .1" rent 1 incling; ca ies:meam

5 wins- .11""

wzmsformm:

Q0 Ti combl ion ding' cempnsing' a coil. nugnbqr two i" Wit 4113mm! haveb1 Alt mentionel sleeve,

1g Flee s being disposed 'm'xtia ily 7 parallel and more surmnnur mybsztwcs 1 it dry

